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<div class="titlepage"><div><div><h3 class="title">
<a name="boost_asio.reference.execution__bulk_execute"></a><a class="link" href="execution__bulk_execute.html" title="execution::bulk_execute">execution::bulk_execute</a>
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<p>
        <a class="indexterm" name="boost_asio.indexterm.execution__bulk_execute"></a> 
A customisation
        point that creates a bulk sender.
      </p>
<pre class="programlisting">constexpr unspecified bulk_execute = unspecified;
</pre>
<p>
        The name <code class="computeroutput">execution::bulk_execute</code> denotes a customisation point
        object. If <code class="computeroutput">is_convertible_v&lt;N, size_t&gt;</code> is true, then the
        expression <code class="computeroutput">execution::bulk_execute(S, F, N)</code> for some subexpressions
        <code class="computeroutput">S</code>, <code class="computeroutput">F</code>, and <code class="computeroutput">N</code> is expression-equivalent
        to:
      </p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
            <code class="computeroutput">S.bulk_execute(F, N)</code>, if that expression is valid. If the
            function selected does not execute <code class="computeroutput">N</code> invocations of the
            function object <code class="computeroutput">F</code> on the executor <code class="computeroutput">S</code> in bulk
            with forward progress guarantee <code class="computeroutput">boost::asio::query(S, execution::bulk_guarantee)</code>,
            and the result of that function does not model <code class="computeroutput">sender&lt;void&gt;</code>,
            the program is ill-formed with no diagnostic required.
          </li>
<li class="listitem">
            Otherwise, <code class="computeroutput">bulk_execute(S, F, N)</code>, if that expression is
            valid, with overload resolution performed in a context that includes
            the declaration <code class="computeroutput">void bulk_execute();</code> and that does not include
            a declaration of <code class="computeroutput">execution::bulk_execute</code>. If the function
            selected by overload resolution does not execute <code class="computeroutput">N</code> invocations
            of the function object <code class="computeroutput">F</code> on the executor <code class="computeroutput">S</code>
            in bulk with forward progress guarantee <code class="computeroutput">boost::asio::query(E, execution::bulk_guarantee)</code>,
            and the result of that function does not model <code class="computeroutput">sender&lt;void&gt;</code>,
            the program is ill-formed with no diagnostic required.
          </li>
<li class="listitem">
            Otherwise, if the types <code class="computeroutput">F</code> and <code class="computeroutput">executor_index_t&lt;remove_cvref_t&lt;S&gt;&gt;</code>
            model <code class="computeroutput">invocable</code> and if <code class="computeroutput">boost::asio::query(S, execution::bulk_guarantee)</code>
            equals <code class="computeroutput">execution::bulk_guarantee.unsequenced</code>, then
          </li>
<li class="listitem">
            Evaluates <code class="computeroutput">DECAY_COPY(std::forward&lt;decltype(F)&gt;(F))</code>
            on the calling thread to create a function object <code class="computeroutput">cf</code>. [Note:
            Additional copies of <code class="computeroutput">cf</code> may subsequently be created. --end
            note.]
          </li>
<li class="listitem">
            For each value of <code class="computeroutput">i</code> in <code class="computeroutput">N</code>, <code class="computeroutput">cf(i)</code>
            (or copy of <code class="computeroutput">cf</code>)) will be invoked at most once by an execution
            agent that is unique for each value of <code class="computeroutput">i</code>.
          </li>
<li class="listitem">
            May block pending completion of one or more invocations of <code class="computeroutput">cf</code>.
          </li>
<li class="listitem">
            Synchronizes with (C++Std [intro.multithread]) the invocations of <code class="computeroutput">cf</code>.
          </li>
<li class="listitem">
            Otherwise, <code class="computeroutput">execution::bulk_execute(S, F, N)</code> is ill-formed.
          </li>
</ul></div>
<h5>
<a name="boost_asio.reference.execution__bulk_execute.h0"></a>
        <span class="phrase"><a name="boost_asio.reference.execution__bulk_execute.requirements"></a></span><a class="link" href="execution__bulk_execute.html#boost_asio.reference.execution__bulk_execute.requirements">Requirements</a>
      </h5>
<p>
        <span class="emphasis"><em>Header: </em></span><code class="literal">boost/asio/execution/bulk_execute.hpp</code>
      </p>
<p>
        <span class="emphasis"><em>Convenience header: </em></span><code class="literal">boost/asio/execution.hpp</code>
      </p>
</div>
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<td align="right"><div class="copyright-footer">Copyright © 2003-2021 Christopher
      M. Kohlhoff<p>
        Distributed under the Boost Software License, Version 1.0. (See accompanying
        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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